243198465 has 16 divisors (see below), whose sum is σ = 389320128. Its totient is φ = 129638336.

The previous prime is 243198421. The next prime is 243198479. The reversal of 243198465 is 564891342.

It is a cyclic number.

It is not a de Polignac number, because 243198465 - 2⁶ = 243198401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41614 + ... + 47096.

It is an arithmetic number, because the mean of its divisors is an integer number (24332508).

Almost surely, 2^243198465 is an apocalyptic number.

It is an amenable number.

243198465 is a deficient number, since it is larger than the sum of its proper divisors (146121663).

243198465 is a wasteful number, since it uses less digits than its factorization.

243198465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8448.

The product of its digits is 207360, while the sum is 42.

The square root of 243198465 is about 15594.8217367176. The cubic root of 243198465 is about 624.1949870384.

The spelling of 243198465 in words is "two hundred forty-three million, one hundred ninety-eight thousand, four hundred sixty-five".